We all know that you can not use 100% of the advertised battery capacity of any EV. A 24kWh Leaf gives you about 22kWh of usable capacity, but it is rumoured that a 85kWh Model S battery is actually 81kWh and roughly 74kWh is usable. It might be to soon, but should we (EU and US) should come up with legislation where EV manufacturers have to provide the available capacity for driving? I don't want to make this discussion Tesla specific, but I'm curious what others think. Should we as consumers be told how many kWh we can use for driving?